Most simply put, Web 2.0 refers to a perceived transition of the World Wide Web from a collection of websites to a full-fledged computing platform serving web applications to end users. Proponents of this thinking expect that, ultimately, Web 2.0 services will replace desktop computing applications for many purposes.
The term was coined by Dale Dougherty of O'Reilly Media brainstorming with Craig Cline of MediaLive to develop ideas for a conference that they could jointly host. Dougherty suggested that the Web was in a renaissance, with changing rules and evolving business models. Dougherty gave examples: "DoubleClick was Web 1.0; Google AdSense is Web 2.0. Ofoto was Web 1.0; Flickr is Web 2.0." - rather than definitions. He recruited John Battelle for a business perspective, and O'Reilly Media, Battelle, and MediaLive launched the first Web 2.0 Conference in October 2004.
According to O'Reilly, Web 2.0 can be compared to Web 1.0 in this way:
Web 1.0________________Web 2.0_____________Utility
DoubleClick____________Google AdSense________Advertising
Ofoto_________________Flickr_________________Photo sharing
Akamai________________BitTorrent_____________Content distribution
MP3.com______________Napster_______________Music sharing
Britannica Online________Wikipedia _____________Encyclopedias
personal websites_______blogging_______________Personal pages
Evite__________________upcoming.org; EVDB____ Event planning
domain name speculation__search engine opt.______Business promotion
page views_____________cost per click__________Ad pricing metrics
screen scraping ________web services__________Content syndication
publishing______________participation___________Content creation
content mgmt systems____wikis________________Content management
directories (taxonomy)____tagging ("folksonomy")__Content classification
stickiness______________syndication____________Interoperability
In his paper What is Web 2.0? Design Patterns and Business Models for the Next Generation of Sofware Tim O'Reilly dicusses the key themes of Web 2.0. In short, these are the things we can expect to see:
- The web will become a platform where users control their own data
- The web will be used to capture and categorize our collective intelligence (through wikis, blogs, tagging, etc.)
- Data becomes the "Intel Inside", and there is currently a race on to own certain classes of core data (e.g., mapping information)
- No more software release cycles since the Internet offers software as a service and not a product
- Complex, proprietary software applications will be replaced by "lightweight", open-source programs that can easily be hacked and remixed
- New web services will offer rich user interfaces and PC-quality interactivity


Comments: 1
Thanks for making us aware of the conference's highlights. If we are in a new wave of development, I am excited for how our lives will change yet again (imagine, 10 years ago Microsoft did not offer IE, and a fast connections was a 14.4k modem.
I think the user-defined web will mean many things for the participants, and will let anyone take control of their interactions with others. Let's hope Gather takes us there!